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ladybird/Libraries/LibWeb/HTML/HTMLImageElement.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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#pragma once
AK: Add a forward declaration header You can now #include <AK/Forward.h> to get most of the AK types as forward declarations. Header dependency explosion is one of the main contributors to compile times at the moment, so this is a step towards smaller include graphs.
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#include <AK/ByteBuffer.h>
LibWeb: Split out image loading logic from HTMLImageElement Since more DOM nodes are going to want to load images (<object>, ...) this patch splits out the image loading logic into an ImageLoader class and then HTMLImageElement simply has an ImageLoader. LayoutImage is then given a const ImageLoader& at construction and can then provide layout and rendering for many kinds of DOM nodes.
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#include <AK/OwnPtr.h>
LibGfx: More work on header dependency reduction
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#include <LibGfx/Forward.h>
LibWeb: Move HTML object model stuff into LibWeb/HTML/ Take a hint from SVG and more all the HTML classes into HTML instead of mixing them with the DOM classes.
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#include <LibWeb/HTML/HTMLElement.h>
LibWeb: Split out image loading logic from HTMLImageElement Since more DOM nodes are going to want to load images (<object>, ...) this patch splits out the image loading logic into an ImageLoader class and then HTMLImageElement simply has an ImageLoader. LayoutImage is then given a const ImageLoader& at construction and can then provide layout and rendering for many kinds of DOM nodes.
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#include <LibWeb/Loader/ImageLoader.h>
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
2019-10-05 22:07:45 +02:00
LibWeb: Move everything into the Web namespace
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namespace Web {
LibHTML: Mark image bitmaps outside the visible viewport as volatile When the visible viewport rect changes, we walk the layout tree and check where each LayoutImage is in relation to the viewport rect. Images outside have their bitmaps marked as volatile. Note that the bitmaps are managed by ImageDecoder objects. If a bitmap is purged by the kernel while volatile, we construct a new ImageDecoder next time we need pixels for the image.
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class LayoutDocument;
LibWeb: Split out image loading logic from HTMLImageElement Since more DOM nodes are going to want to load images (<object>, ...) this patch splits out the image loading logic into an ImageLoader class and then HTMLImageElement simply has an ImageLoader. LayoutImage is then given a const ImageLoader& at construction and can then provide layout and rendering for many kinds of DOM nodes.
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class HTMLImageElement final : public HTMLElement {
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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public:
LibWeb: Add a JavaScript wrapper for HTMLImageElement :^)
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using WrapperType = Bindings::HTMLImageElementWrapper;
LibWeb: Move DOM classes into the Web::DOM namespace LibWeb keeps growing and the Web namespace is filling up fast. Let's put DOM stuff into Web::DOM, just like we already started doing with SVG stuff in Web::SVG.
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HTMLImageElement(DOM::Document&, const FlyString& local_name);
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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virtual ~HTMLImageElement() override;
LibWeb: Use FlyString for element attribute names Attribute names occur again and again.
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virtual void parse_attribute(const FlyString& name, const String& value) override;
LibHTML: Load image resource when src attribute is set
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LibWeb: Use HTML::AttributeNames::foo instead of FlyString("foo") To avoid the costly instantiation of FlyStrings whenever we're looking up attributes, use the premade HTML::AttributeNames globals. :^)
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String alt() const { return attribute(HTML::AttributeNames::alt); }
String src() const { return attribute(HTML::AttributeNames::src); }
LibHTML: Implement basic layout for inline <img alt> LayoutReplaced objects can now participate in inline layout. It's very hackish, but basically LayoutReplaced will just add itself to the last line in the containing block. This patch gets rid of the idea that only LayoutInline subclasses can be split into lines, by moving the split_into_lines() virtual up to LayoutNode and overriding it in LayoutReplaced.
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LibDraw: Put all classes in the Gfx namespace I started adding things to a Draw namespace, but it somehow felt really wrong seeing Draw::Rect and Draw::Bitmap, etc. So instead, let's rename the library to LibGfx. :^)
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const Gfx::Bitmap* bitmap() const;
LibHTML: Support rendering <img src> with file:// URLs We can now show images loaded from local file:// URLs. Pretty neat :^)
2019-10-05 23:41:14 +02:00
LibHTML: Implement basic layout for inline <img alt> LayoutReplaced objects can now participate in inline layout. It's very hackish, but basically LayoutReplaced will just add itself to the last line in the containing block. This patch gets rid of the idea that only LayoutInline subclasses can be split into lines, by moving the split_into_lines() virtual up to LayoutNode and overriding it in LayoutReplaced.
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private:
LibWeb: Parse "width" and "height" presentation attributes on <img> These are HTML lengths that map to CSS width and height respectively.
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virtual void apply_presentational_hints(StyleProperties&) const override;
LibWeb: Add support for animated images to HTMLImageElement Uses a Core::Timer (similar to HTMLBlinkElement) to transition between frames of an animated image. Also keeps track of the number of animation loops.
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void animate();
LibWeb: Move border width and color into LayoutStyle To make this possible, I also had to give each LayoutNode a Document& so it can resolve document-specific colors correctly. There's probably ways to avoid having this extra member by resolving colors later, but this works for now.
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virtual RefPtr<LayoutNode> create_layout_node(const StyleProperties* parent_style) override;
LibHTML: Support rendering <img src> with file:// URLs We can now show images loaded from local file:// URLs. Pretty neat :^)
2019-10-05 23:41:14 +02:00
LibWeb: Split out image loading logic from HTMLImageElement Since more DOM nodes are going to want to load images (<object>, ...) this patch splits out the image loading logic into an ImageLoader class and then HTMLImageElement simply has an ImageLoader. LayoutImage is then given a const ImageLoader& at construction and can then provide layout and rendering for many kinds of DOM nodes.
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ImageLoader m_image_loader;
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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};
LibWeb: Move everything into the Web namespace
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LibWeb: Add is<HTMLImageElement>()
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}
LibWeb: Switch to using AK::is and AK::downcast
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AK_BEGIN_TYPE_TRAITS(Web::HTMLImageElement)
LibWeb: Move DOM classes into the Web::DOM namespace LibWeb keeps growing and the Web namespace is filling up fast. Let's put DOM stuff into Web::DOM, just like we already started doing with SVG stuff in Web::SVG.
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static bool is_type(const Web::DOM::Node& node) { return node.is_element() && downcast<Web::DOM::Element>(node).local_name() == Web::HTML::TagNames::img; }
LibWeb: Switch to using AK::is and AK::downcast
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AK_END_TYPE_TRAITS()
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